Here is an update of pictures on the raised grow beds I am making for my 5 grandsons. They all live on our homestead in their own homes. Before adding the soil we dug up the grass and roots. This left a 5" deep depression we filled with new garden soil. Since the natural ground is almost solid clay, it should hold water for the grow beds. I did the same with my bigger raised bed. On mine I used the bucket on my tractor and dug out about 10" of clay soil. My garden should hold a lot of water in the bottom. The other four mini beds should be planted tomorrow with the other boys.